/usr/share/gmt/cpt/wysiwyg.cpt is in gmt-common 5.3.1+dfsg-2.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 | # $Id: wysiwyg.cpt 16562 2016-06-18 04:04:08Z pwessel $
#
# wysiwyg.cpt has 20 RGB colors for openwin -cubesize large and waxenvy printer.
# Designed by W. H. F. Smith
#
#----------------------------------------------------------
# COLOR_MODEL = RGB
#----------------------------------------------------------
0 64/0/64 0.05 64/0/64
0.05 64/0/192 0.1 64/0/192
0.1 0/64/255 0.15 0/64/255
0.15 0/128/255 0.2 0/128/255
0.2 0/160/255 0.25 0/160/255
0.25 64/192/255 0.3 64/192/255
0.3 64/224/255 0.35 64/224/255
0.35 64/255/255 0.4 64/255/255
0.4 64/255/192 0.45 64/255/192
0.45 64/255/64 0.5 64/255/64
0.5 128/255/64 0.55 128/255/64
0.55 192/255/64 0.6 192/255/64
0.6 255/255/64 0.65 255/255/64
0.65 255/224/64 0.7 255/224/64
0.7 255/160/64 0.75 255/160/64
0.75 255/96/64 0.8 255/96/64
0.8 255/32/64 0.85 255/32/64
0.85 255/96/192 0.9 255/96/192
0.9 255/160/255 0.95 255/160/255
0.95 255/224/255 1 255/224/255
#----------------------------------------------------------
|